At least 49 cases have been confirmed. Health officials — who are scrambling to get a handle on the vaccine-preventable outbreak — suspect 200 to 300 people may be infected.

The measles outbreak in the South Plains region, in West Texas, has expanded to at least 48 people, most of them children.

The ongoing measles outbreak in West Texas has doubled in size to 48 cases. It's the state's worst in nearly 30 years.